There are other marvelous power-plants situated on rivers where, although the force is far less than that of the mountain torrents, the volume of water is far greater. Idaho shows the most remarkable of the developments of such water-power, and the astounding ingenuity and determination of the genii are shown as much as in the mountains. The Bear River, which runs through Idaho and Utah, carries a very large flow at an exceedingly rapid rate--for a river. At one point in Idaho no less than six great power-houses have been installed on that river, producing a total of nearly 200,000 horse-power. In order to secure good headway, and the force which this gives, two enormous pipe-lines have been built to take the water from upper reaches of the river, and, while holding that pipe almost to a level, run it across country to a lower reach, where a power-house is built, thus increasing the headway from nothing to two or three hundred feet. One of these lines is of eleven-foot pipe, nearly five miles long; the other is a sixteen-foot pipe, half a mile long. Almost all of the current produced at these plants is transmitted by cable to Salt Lake City, 135 miles away. It has been said by expert engineers of electrical development that it will be but a short time before the intermountain region will use no coal, that all smoke-stacks and chimneys will be abolished and electricity furnish all the power, heat, and light not only to cities and towns, but to farming communities. We are on the way. There are some districts now where villages, towns, and farms all use electricity for power and for lighting and cooking. This is notably so in Rupert, Idaho, the home of the famous electric high school, described in "St. Nicholas" in September, 1913. All through that town the lighting and cooking in even the humblest homes is by electricity. The few small factories use no coal or steam-power. In the mountain region over one hundred cities, towns, and rural communities have electric wires in their houses. All are lighted by them and very many have thrown out coal ranges and cook by electricity. The region is one of mines everywhere, some of them the largest in the world; and nearly all of them have discarded their gigantic steam-, hoisting-, and pumping-engines for electric motors. There is, it is asserted, more than enough water-power running to waste to do every particle of work now done by steam, horses, and men and women in the region, from impelling the enormous sixteen-wheeled mountain Moguls to rocking the babies' cradles by motor.